Factors influencing the tensile strength of polymerizer headsample were introduced, which included the sampling position, sampling direction, sampling quantity and the cross section shape of sample.
介绍了影响聚合釜封头试样拉伸性能的因素：取样部位、取样方向和取样数量及试样的横截面形状。
2
I can't just go into your head and take a sample of your brain cells and extract them and study them.
我不可能直接从你的大脑中取出细胞样本来研究它们。
3
To do this, make a HEAD request and then check for a 404 error in your callback function; Listing 11 shows a sample callback.